<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <button id="btn">生成彩票</button>
  <div id="result">

  </div>

  <script>
    let btn = document.getElementById('btn');
    let result = document.getElementById('result');

    
    btn.addEventListener('click', function() {
      let arr = [];
      // 生成7个 [1-36] 随机数字
      for(let i = 0; i < 7; i++){
        let num = Math.floor(Math.random() * 36) + 1;
        arr.push(num);
      }
      result.innerHTML = arr;

      history.pushState(arr, null);

    }, false);

    window.onpopstate = function(e){
      result.innerHTML = e.state;
    }



  </script>
</body>
</html>